1666818303336 has 24 divisors (see below), whose sum is σ = 4514299571730. Its totient is φ = 555606101088.

The previous prime is 1666818303331. The next prime is 1666818303457. The reversal of 1666818303336 is 6333038186661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1591306560900 + 75511742436 = 1261470^2 + 274794^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1666818303331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11575127035 + ... + 11575127178.

Almost surely, 2^{1666818303336} is an apocalyptic number.

It is an amenable number.

1666818303336 is an abundant number, since it is smaller than the sum of its proper divisors (2847481268394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666818303336 is a wasteful number, since it uses less digits than its factorization.

1666818303336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23150254225 (or 23150254218 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 1666818303336 in words is "one trillion, six hundred sixty-six billion, eight hundred eighteen million, three hundred three thousand, three hundred thirty-six".